Win32 startup error

[p5pRT]

Migrated from rt.perl.org#931 (status was 'resolved')

Searchable as RT931$

[p5pRT]

From [email protected]

If perl.exe and perl.dll are run from the directory c​:\bin, an access
violation occurs when it is run. It appears that the drive is
immaterial
and there may be other directories that cause problems.

The problem is caused by the code​:

  ptr = strrchr(mod_name, '\\');
  if (!ptr || stricmp(ptr+1, strip) != 0) {
  if(!(*strip == '5' && *(ptr+1) == '5' && strncmp(strip, base, 5)
== 0
  && strncmp(ptr+1, base, 5) == 0)) {
  ...

in get_emd_part() in win32.c (code reformated for email).

If strrchr() returns a null pointer, !ptr is true and the controlled
block
is executed. In the second if, *(ptr+1) then causes an access
violation.

I've not yet completely analyzed this code or tested the fix, but
changing the
first if to

  if (ptr && stricmp(ptr+1, strip) != 0)

appears to fix the problem.

This was compiled from the standard distribution with Microsoft Visual
C++
6.0.

Perl Info

Site configuration information for perl 5.00503:

Summary of my perl5 (5.0 patchlevel 5 subversion 03) configuration:
  Platform:
    osname=MSWin32, osvers=4.0, archname=MSWin32-x86
    uname=''
    hint=recommended, useposix=true, d_sigaction=undef
    usethreads=undef useperlio=undef d_sfio=undef
  Compiler:
    cc='cl.exe', optimize='-Od -MD -DNDEBUG', gccversion=
    cppflags='-DWIN32'
    ccflags ='-Od -MD -DNDEBUG -DWIN32 -D_CONSOLE -DNO_STRICT   '
    stdchar='char', d_stdstdio=define, usevfork=false
    intsize=4, longsize=4, ptrsize=4, doublesize=8
    d_longlong=undef, longlongsize=8, d_longdbl=define, longdblsize=10
    alignbytes=8, usemymalloc=n, prototype=define
  Linker and Libraries:
    ld='link', ldflags ='-nologo -nodefaultlib -release -machine:x86'
    libpth=f:\progra~1\micros~2\vc98\lib c:\custom\vc98\lib
    libs= oldnames.lib kernel32.lib user32.lib gdi32.lib  winspool.lib
comdlg32.lib advapi32.lib shell32.lib ole32.lib  oleaut32.lib
netapi32.lib uuid.lib wsock32.lib mpr.lib winmm.lib  version.lib
odbc32.lib odbccp32.lib PerlCRT.lib
    libc=PerlCRT.lib, so=dll, useshrplib=yes, libperl=perl.lib
  Dynamic Linking:
    dlsrc=dl_win32.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' '
    cccdlflags=' ',
lddlflags='-dll -nologo -nodefaultlib -release -machine:x86'

Locally applied patches:



@INC for perl 5.00503:
    c:\perl\5.00503\lib/MSWin32-x86
    c:\perl\5.00503\lib
    c:\perl\site\5.00503\lib/MSWin32-x86
    c:\perl\site\5.00503\lib
    .


Environment for perl 5.00503:
    HOME=c:\etc
    LANG (unset)
    LANGUAGE=MSC
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=C:\B;F:\PROGRAM FILES\MICROSOFT VISUAL
STUDIO\VC98\BIN;F:\PROGRAM FILES\MICROSOFT VISUAL
STUDIO\COMMON\MSDEV98\BIN;C:\BIN;E:\NTRESKIT;D:\CYGNUS\CYGWIN-B20\H-I5
86-CYGWIN32\BIN;C:\WINNTS\SYSTEM32;C:\WINNTS
    PERL_BADLANG (unset)
    SHELL (unset)